Of course, libraries are still around today. But as they update their cataloging systems to computers and phase out books that are falling apart, some of their history — and the histories of their patrons — is lost.

Photographer Kerry Mansfield hopes to preserve these old-fashioned elements of the way libraries used to be by documenting discarded library books and handwritten checkout cards. She has photographed over 180 books for her series "Expired," and believes that every creased page, fraying spine, and scribbled note tells a story of its own.

Here are 23 photos of old library books that will make you nostalgic.

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Kerry Mansfield photographs old library books and checkout cards for her photo series "Expired."

"I hope that they get a memory, a nostalgic rush, of their time they spent in a library or checking out books," she said.

"The idea that someone can remember writing their name on a checkout card, how it was stamped when they returned it, or that they put it through the book slot in the back of the library on Sundays because it wasn't open...